Official Unity glTFast package is now available

Great to hear this, expecting for quite a long time now, KHR 2.0 texture support

 

Nice! I am wondering why it starts with "cloud" in the package name though -- like if I'm looking at package names and I see "cloud" I would have never guessed it has to do with asset importing. Other formats, well, have "com.unity.formats" as the name (Alembic, USD, FBX), why not keep that consistent?

 

Will see if I'm right, but if I have to guess I would guess that the Cloud team made it, who makes that new cloud-based Asset Manager on the dashboard. Because we could ask for it for long years and they only develop it when they have opportunity sell yet another cloud-based service.

 

Awesome!

 

Is it just me or are installation instructions missing ?

edit : nevermind, found it

 

Why is it even a package? It should be in core unity's supported file formats.

 

This is great, already using a previous version.
But this KTX texture format also looks exciting - does this mean 1 format that can be converted quickly to any platform-specific compressed GPU format on download?

 

I'm trying to export multiple prefabs into separate gltf files.

Using Assets > Export glTF > glTF, I can export my selected prefab assets, but it saves it into ONE gltf with ALL the prefabs in it.

Is there a way to bulk-export multiple glTF files, one for each selected prefab?

Thanks

 

@seth-unity I've been trying to get the word out to fellow devs and got positive response from them (e.g.: https://www.linkedin.com/posts/jbie...-available-activity-7153124253494599681-WyRG/). This really deserves a Unity Blog post.

 

This is a great addition to Unity ! The import part is very excellent !

I have more problems with the export part in runtime. First problem is that we cannot export a previously imported model, we lose all the material properties.
My second concern is that it lacks skinning support for export. This is something that would be very useful for our project. I hope these 2 points can be resolved in the future.

 

This is really nice, thanks!

 

Nice, I was waiting for over three years, some feedbacks:

1) there is no simple way to extract and make editable materials like other 3d models import settings, the only way I found was to do a copy and paste of the materials from the Project area and replace them manually (or using a script which searches the same material name)

2) there is no option to set the default import scale like for other 3d models import settings so the only quick way is to drag into hierarchy, change the scale, create a prefab and use it

 

Thanks. I got the desired results by looping through the Export function :+1:

My next questions:

How can we get this to work for humanoid characters?

It seems like my exports of human characters don't contain an armature when importing them into blender.

Also:

My textures seem to be converting from png to jpg. Is there any way to prevent this and keep them uncompressed as in the original texture?


Thanks for the help!

 

now that the other unitygltf package is updated, just adding here link to comparison:
https://github.com/KhronosGroup/UnityGLTF#unitygltf-and-gltfast

 

Thanks for posting. Nice to see some alternatives.

Does anyone happen to know how to resolve the mesh separation when it has multiple materials? While I do prefer the Unity package, this is a significant issue, especially since the file will not contain unique names for those meshes. The Khronos package seems to handle it better by merging the meshes for you (I'll probably have to end up doing this by hand), but I'm curious how others are overcoming it.

 

Is this package able to export baked lightmaps from Unity along with the lightmap UVmap that comes with it? Or is there any other way at all to export and re-use those baked maps somewhere else?

 

Yeah this is a real oddity but is it not down to the gltf format itself separating meshes by material?
If the Khronos package can combine them then is that supported for runtime loading and is it not a performance issue if used there?

 

Yes, but generally if we want to instantiate a specific mesh by name then it's strange because there may be N meshes with the same name in the gltf file. There's clearly a way to access the data and understand their relationship/material mapping in order to merge them, but it's not clear at a glance how to do so. Feels inelegant overall, but it may just be our use-case making me biased. I'm happy to work around it, just not sure how to do so yet.

 

Hi, I was able to SaveToFileAndDispose the gltf. My final project is to send mesh over WebRTC. Is there a posibility to read the gltf data as a string or bytes ? I'm using RTCDataChannel to send the file.
Thanks in advance.
Mycode

Code (CSharp):

1. async void GltfExport()
2.     {
3.         // Example of gathering GameObjects to be exported (recursively)
4.         var rootLevelNodes = GameObject.FindGameObjectsWithTag("ExportMe");
5.  
6.         // ExportSettings provides generic export settings
7.         var exportSettings = new ExportSettings
8.         {
9.             Format = GltfFormat.Binary,
10.             FileConflictResolution = FileConflictResolution.Overwrite,
11.             // Enable Draco compression
12.             Compression = Compression.Draco,
13.             // Tweak the Draco compression settings
14.             DracoSettings = new DracoExportSettings
15.             {
16.                 positionQuantization = 12
17.             }
18.         };
19.  
20.         // GameObjectExport lets you create glTFs from GameObject hierarchies
21.         var export = new GameObjectExport(exportSettings);
22.  
23.         // Add a scene
24.         export.AddScene(rootLevelNodes);
25.  
26.         // Async glTF export
27.         bool success = await export.SaveToFileAndDispose("C:/AumentaSolutions/_DEMOS/DEMO_WebRTC/glTFast/test.gltf");
28.  
29.         if (!success)
30.         {
31.             Debug.LogError("Something went wrong exporting a glTF");
32.         }
33.  
34.         if (success)
35.         {
36.             Debug.Log("exporting a glTF : " + export.ToString().Length);
37.             byte[] fileBytes = System.Text.Encoding.UTF8.GetBytes(export.ToString()); // Trying to read export as byte array
38.             string flieString = export.ToString(); // Trying to read export as string
39.             dataChannel.Send(flieString); // Get "GLTFast.Export.GameObjectExport", not the data file
40.         }
41.     }

 

SOLVED : used SaveToStreamAndDispose

 

Is it possible to get extra data when importing .glb format?

Using a custom addon, my nodes are not casting to GLTFast.Newtonsoft.Schema.Node

```
var node = gltf.Nodes[(int)nodeIndex] as GLTFast.Newtonsoft.Schema.Node;
var extras = node?.extras;
if ( extras == null )
return;```

 

hello,
is there a setting or method to export shadowmaps with this package? it appears that shadowmaps are not exported with the asset when exporting to glb.
Or is there a better way to get the shadow maps from out of unity and into a threejs environment? any advice is greatly appreciated!